This document contains a tutorial and exercises on DC circuit analysis. It begins with calculating the temperature coefficient of resistance using resistance measurements at two different temperatures. Subsequent exercises involve calculating current through parallel wires of different materials, determining current through a resistor in a multi-branch circuit, reducing a circuit to a single voltage source and resistor using source transformation, and determining a current source value given power dissipation in a resistor. The document provides instructions and answers for circuit analysis problems using techniques like network reduction and source transformation.

1. Tutorial – 1:
DC Circuit Analysis

2. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 2
[1] The resistance of a coil of wire increases from 50 Ω at 15° C to 58 Ω at
55° C. Calculate the temperature coefficient of resistance at 0° C
Ans: 0.004255 °C-1
Exercises

3. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 3
Exercise
[2] An Aluminium wire of 7.5 m long is connected in parallel with a
copper wire of 6 m long. When a current of 5 A is passed through the
combination, it is found that the current in the Aluminium wire is 3 A.
The diameter of the Aluminium wire is 1 mm. Determine the diameter
of the copper wire. Resistivity of copper is 0.017 µΩ m; that of
Aluminium is 0.028 µΩ m
[0.569 mm]

4. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 4
1 8 0 V
8 Ω
4 Ω
1 2 Ω 1 0 Ω
1 2 Ω
3 4 Ω
3 0 Ω
1 3 Ω
1 7 Ω
3 0 Ω
F ig 1
Exercises
[3] For the circuit shown in Fig 1, using network reduction techniques,
determine the current through the 10 Ω resistor
Ans: 6 A

5. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 5
Exercise
[4] Using source transformation technique, reduce the circuit below
to a single voltage source and resistance across AB.
[10.636V, 2.18Ω]
+ -
+- +-
2 A
6 V
3 Ω
1 0 V
2 Ω
4 V
6 Ω
9 A
0 . 5 A
A B

6. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 6
Exercise
[5] Using source transformation, determine the value of current
source I if the power dissipated by the 5 Ω resistor is 15W.
[1.8 A]

7. ELE 101 / 102 Dept of E & E Engg, MIT Manipal 6
Exercise
[5] Using source transformation, determine the value of current
source I if the power dissipated by the 5 Ω resistor is 15W.
[1.8 A]